367 lines
12 KiB
C
367 lines
12 KiB
C
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
||
|
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* Module Name: nspredef - Validation of ACPI predefined methods and objects
|
||
|
|
*
|
||
|
|
* Copyright (C) 2000 - 2018, Intel Corp.
|
||
|
|
*
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#define ACPI_CREATE_PREDEFINED_TABLE
|
||
|
|
|
||
|
|
#include <acpi/acpi.h>
|
||
|
|
#include "accommon.h"
|
||
|
|
#include "acnamesp.h"
|
||
|
|
#include "acpredef.h"
|
||
|
|
|
||
|
|
#define _COMPONENT ACPI_NAMESPACE
|
||
|
|
ACPI_MODULE_NAME("nspredef")
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* This module validates predefined ACPI objects that appear in the namespace,
|
||
|
|
* at the time they are evaluated (via acpi_evaluate_object). The purpose of this
|
||
|
|
* validation is to detect problems with BIOS-exposed predefined ACPI objects
|
||
|
|
* before the results are returned to the ACPI-related drivers.
|
||
|
|
*
|
||
|
|
* There are several areas that are validated:
|
||
|
|
*
|
||
|
|
* 1) The number of input arguments as defined by the method/object in the
|
||
|
|
* ASL is validated against the ACPI specification.
|
||
|
|
* 2) The type of the return object (if any) is validated against the ACPI
|
||
|
|
* specification.
|
||
|
|
* 3) For returned package objects, the count of package elements is
|
||
|
|
* validated, as well as the type of each package element. Nested
|
||
|
|
* packages are supported.
|
||
|
|
*
|
||
|
|
* For any problems found, a warning message is issued.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
/* Local prototypes */
|
||
|
|
static acpi_status
|
||
|
|
acpi_ns_check_reference(struct acpi_evaluate_info *info,
|
||
|
|
union acpi_operand_object *return_object);
|
||
|
|
|
||
|
|
static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object);
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ns_check_return_value
|
||
|
|
*
|
||
|
|
* PARAMETERS: node - Namespace node for the method/object
|
||
|
|
* info - Method execution information block
|
||
|
|
* user_param_count - Number of parameters actually passed
|
||
|
|
* return_status - Status from the object evaluation
|
||
|
|
* return_object_ptr - Pointer to the object returned from the
|
||
|
|
* evaluation of a method or object
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Check the value returned from a predefined name.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ns_check_return_value(struct acpi_namespace_node *node,
|
||
|
|
struct acpi_evaluate_info *info,
|
||
|
|
u32 user_param_count,
|
||
|
|
acpi_status return_status,
|
||
|
|
union acpi_operand_object **return_object_ptr)
|
||
|
|
{
|
||
|
|
acpi_status status;
|
||
|
|
const union acpi_predefined_info *predefined;
|
||
|
|
|
||
|
|
/* If not a predefined name, we cannot validate the return object */
|
||
|
|
|
||
|
|
predefined = info->predefined;
|
||
|
|
if (!predefined) {
|
||
|
|
return (AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* If the method failed or did not actually return an object, we cannot
|
||
|
|
* validate the return object
|
||
|
|
*/
|
||
|
|
if ((return_status != AE_OK) && (return_status != AE_CTRL_RETURN_VALUE)) {
|
||
|
|
return (AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Return value validation and possible repair.
|
||
|
|
*
|
||
|
|
* 1) Don't perform return value validation/repair if this feature
|
||
|
|
* has been disabled via a global option.
|
||
|
|
*
|
||
|
|
* 2) We have a return value, but if one wasn't expected, just exit,
|
||
|
|
* this is not a problem. For example, if the "Implicit Return"
|
||
|
|
* feature is enabled, methods will always return a value.
|
||
|
|
*
|
||
|
|
* 3) If the return value can be of any type, then we cannot perform
|
||
|
|
* any validation, just exit.
|
||
|
|
*/
|
||
|
|
if (acpi_gbl_disable_auto_repair ||
|
||
|
|
(!predefined->info.expected_btypes) ||
|
||
|
|
(predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
|
||
|
|
return (AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check that the type of the main return object is what is expected
|
||
|
|
* for this predefined name
|
||
|
|
*/
|
||
|
|
status = acpi_ns_check_object_type(info, return_object_ptr,
|
||
|
|
predefined->info.expected_btypes,
|
||
|
|
ACPI_NOT_PACKAGE_ELEMENT);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
*
|
||
|
|
* 4) If there is no return value and it is optional, just return
|
||
|
|
* AE_OK (_WAK).
|
||
|
|
*/
|
||
|
|
if (!(*return_object_ptr)) {
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* For returned Package objects, check the type of all sub-objects.
|
||
|
|
* Note: Package may have been newly created by call above.
|
||
|
|
*/
|
||
|
|
if ((*return_object_ptr)->common.type == ACPI_TYPE_PACKAGE) {
|
||
|
|
info->parent_package = *return_object_ptr;
|
||
|
|
status = acpi_ns_check_package(info, return_object_ptr);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
|
||
|
|
/* We might be able to fix some errors */
|
||
|
|
|
||
|
|
if ((status != AE_AML_OPERAND_TYPE) &&
|
||
|
|
(status != AE_AML_OPERAND_VALUE)) {
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The return object was OK, or it was successfully repaired above.
|
||
|
|
* Now make some additional checks such as verifying that package
|
||
|
|
* objects are sorted correctly (if required) or buffer objects have
|
||
|
|
* the correct data width (bytes vs. dwords). These repairs are
|
||
|
|
* performed on a per-name basis, i.e., the code is specific to
|
||
|
|
* particular predefined names.
|
||
|
|
*/
|
||
|
|
status = acpi_ns_complex_repairs(info, node, status, return_object_ptr);
|
||
|
|
|
||
|
|
exit:
|
||
|
|
/*
|
||
|
|
* If the object validation failed or if we successfully repaired one
|
||
|
|
* or more objects, mark the parent node to suppress further warning
|
||
|
|
* messages during the next evaluation of the same method/object.
|
||
|
|
*/
|
||
|
|
if (ACPI_FAILURE(status) || (info->return_flags & ACPI_OBJECT_REPAIRED)) {
|
||
|
|
node->flags |= ANOBJ_EVALUATED;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ns_check_object_type
|
||
|
|
*
|
||
|
|
* PARAMETERS: info - Method execution information block
|
||
|
|
* return_object_ptr - Pointer to the object returned from the
|
||
|
|
* evaluation of a method or object
|
||
|
|
* expected_btypes - Bitmap of expected return type(s)
|
||
|
|
* package_index - Index of object within parent package (if
|
||
|
|
* applicable - ACPI_NOT_PACKAGE_ELEMENT
|
||
|
|
* otherwise)
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Check the type of the return object against the expected object
|
||
|
|
* type(s). Use of Btype allows multiple expected object types.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ns_check_object_type(struct acpi_evaluate_info *info,
|
||
|
|
union acpi_operand_object **return_object_ptr,
|
||
|
|
u32 expected_btypes, u32 package_index)
|
||
|
|
{
|
||
|
|
union acpi_operand_object *return_object = *return_object_ptr;
|
||
|
|
acpi_status status = AE_OK;
|
||
|
|
char type_buffer[96]; /* Room for 10 types */
|
||
|
|
|
||
|
|
/* A Namespace node should not get here, but make sure */
|
||
|
|
|
||
|
|
if (return_object &&
|
||
|
|
ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
|
||
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
||
|
|
info->node_flags,
|
||
|
|
"Invalid return type - Found a Namespace node [%4.4s] type %s",
|
||
|
|
return_object->node.name.ascii,
|
||
|
|
acpi_ut_get_type_name(return_object->node.
|
||
|
|
type)));
|
||
|
|
return (AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
|
||
|
|
* The bitmapped type allows multiple possible return types.
|
||
|
|
*
|
||
|
|
* Note, the cases below must handle all of the possible types returned
|
||
|
|
* from all of the predefined names (including elements of returned
|
||
|
|
* packages)
|
||
|
|
*/
|
||
|
|
info->return_btype = acpi_ns_get_bitmapped_type(return_object);
|
||
|
|
if (info->return_btype == ACPI_RTYPE_ANY) {
|
||
|
|
|
||
|
|
/* Not one of the supported objects, must be incorrect */
|
||
|
|
goto type_error_exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* For reference objects, check that the reference type is correct */
|
||
|
|
|
||
|
|
if ((info->return_btype & expected_btypes) == ACPI_RTYPE_REFERENCE) {
|
||
|
|
status = acpi_ns_check_reference(info, return_object);
|
||
|
|
return (status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Attempt simple repair of the returned object if necessary */
|
||
|
|
|
||
|
|
status = acpi_ns_simple_repair(info, expected_btypes,
|
||
|
|
package_index, return_object_ptr);
|
||
|
|
if (ACPI_SUCCESS(status)) {
|
||
|
|
return (AE_OK); /* Successful repair */
|
||
|
|
}
|
||
|
|
|
||
|
|
type_error_exit:
|
||
|
|
|
||
|
|
/* Create a string with all expected types for this predefined object */
|
||
|
|
|
||
|
|
acpi_ut_get_expected_return_types(type_buffer, expected_btypes);
|
||
|
|
|
||
|
|
if (!return_object) {
|
||
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
||
|
|
info->node_flags,
|
||
|
|
"Expected return object of type %s",
|
||
|
|
type_buffer));
|
||
|
|
} else if (package_index == ACPI_NOT_PACKAGE_ELEMENT) {
|
||
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
||
|
|
info->node_flags,
|
||
|
|
"Return type mismatch - found %s, expected %s",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(return_object), type_buffer));
|
||
|
|
} else {
|
||
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
||
|
|
info->node_flags,
|
||
|
|
"Return Package type mismatch at index %u - "
|
||
|
|
"found %s, expected %s", package_index,
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(return_object), type_buffer));
|
||
|
|
}
|
||
|
|
|
||
|
|
return (AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ns_check_reference
|
||
|
|
*
|
||
|
|
* PARAMETERS: info - Method execution information block
|
||
|
|
* return_object - Object returned from the evaluation of a
|
||
|
|
* method or object
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Check a returned reference object for the correct reference
|
||
|
|
* type. The only reference type that can be returned from a
|
||
|
|
* predefined method is a named reference. All others are invalid.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static acpi_status
|
||
|
|
acpi_ns_check_reference(struct acpi_evaluate_info *info,
|
||
|
|
union acpi_operand_object *return_object)
|
||
|
|
{
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the reference object for the correct reference type (opcode).
|
||
|
|
* The only type of reference that can be converted to a union acpi_object is
|
||
|
|
* a reference to a named object (reference class: NAME)
|
||
|
|
*/
|
||
|
|
if (return_object->reference.class == ACPI_REFCLASS_NAME) {
|
||
|
|
return (AE_OK);
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags,
|
||
|
|
"Return type mismatch - unexpected reference object type [%s] %2.2X",
|
||
|
|
acpi_ut_get_reference_name(return_object),
|
||
|
|
return_object->reference.class));
|
||
|
|
|
||
|
|
return (AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ns_get_bitmapped_type
|
||
|
|
*
|
||
|
|
* PARAMETERS: return_object - Object returned from method/obj evaluation
|
||
|
|
*
|
||
|
|
* RETURN: Object return type. ACPI_RTYPE_ANY indicates that the object
|
||
|
|
* type is not supported. ACPI_RTYPE_NONE indicates that no
|
||
|
|
* object was returned (return_object is NULL).
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Convert object type into a bitmapped object return type.
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object)
|
||
|
|
{
|
||
|
|
u32 return_btype;
|
||
|
|
|
||
|
|
if (!return_object) {
|
||
|
|
return (ACPI_RTYPE_NONE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Map acpi_object_type to internal bitmapped type */
|
||
|
|
|
||
|
|
switch (return_object->common.type) {
|
||
|
|
case ACPI_TYPE_INTEGER:
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_INTEGER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_BUFFER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_STRING;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_PACKAGE:
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_PACKAGE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_REFERENCE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
/* Not one of the supported objects, must be incorrect */
|
||
|
|
|
||
|
|
return_btype = ACPI_RTYPE_ANY;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return (return_btype);
|
||
|
|
}
|